arm64: dts: mediatek: Fix node name for SYSIRQ controller on all SoCs

The sysirq has "intpol-controller" as node name, but being this an
interrupt controller, it needs to be named "interrupt-controller"
as per what the bindings (correctly) expect.

This commit brings no functional changes, but fixes a dtbs_check
warning.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20250724083914.61351-23-angelogioacchino.delregno@collabora.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>